No error messages, other than the node Error { [Error: spawn ENOENT] code: 'ENOENT', errno: 'ENOENT', syscall: 'spawn' }, which I know is thrown when the graphicsmagick module isn't installed on the server.

When I follow the steps outlined in https://github.com/progrium/dokku/wiki/Plugins, the plugin appears to be installed in /var/lib/dokku/plugins, but not in my app's container. If there is any documentation you could point me to on how to subsequently install in the app's docker container that would be useful.

I'm hopping over from Nodejitsu, and getting this to work will be a deal-breaker, which is unfortunate since I have enjoyed playing with Digitalocean so far :(